I am not sure whether this is a "support" request or a bug report. If the concensus is "bug" I will submit a report. In any case, I hope someone can help me sort this out.
Due to a md Fail event, I replaced the hard drives (SFF box, two HD's, RAID1) and reinstalled SME 7.4. After the installation and configuration was complete I installed the DAR2 contrib and restored data to the machine from the backups. Web sites, email and vpn services are working fine.
However, other contribs cannot connect to MySQL. E.g. log on to phpMyAdmin returns "MySql said: #1045 - Access denied for user 'root'@'localhost' (using password: YES)" error message. I uninstalled the phpMyAdmin using yum, reinstalled, performed signal-event post-upgrade and reboot. That did not change the result.
Bug report #4773 is not the same because DAR2 is not involved. I tried changing the password per bug 4773 but that did not work in this case. Bug 5150 is similar but the report doesn't involve DAR2 and the circumstance behind the report is ambiguous.
The wiki page
http://wiki.contribs.org/MySQL#Resetting_the_MySQL_root_password is tempting.
Is is possible the password for user root is different due to the clean install and subsequent restore?